We'll try another way later.
Dump UCW package.
Drop unused variable.
Whitespace.
Dump unused utility.
Dump unused utility.
Just call it STATE (rather than NODE-STATE).
INITIAL-STATE rather than PROBLEM-INITIAL-STATE.
PARENT instead of NODE-PARENT.
ACTION rather than NODE-ACTION.
Prefer NODE-EXPANDED-P.
Simpler.
SUCCESSORS.
SUCCESSORS-IN-PROBLEM.
Don't load RULESET.
Merge ruleset.lisp into dialogue.lisp.
New names.
Is this a NODE?
MAKE-INSTANCE rather than MAKE-NODE.
Dump unused stuff.